Physiological Effects of Muscular Exercise on Circulation Quiz
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Questions and Answers

What is the main reason for the increase in cardiac output during exercise?

  • Decrease in venous return
  • Decrease in end diastolic volume
  • Decrease in stroke volume due to sympathetic stimulation
  • Increase in stroke volume due to sympathetic stimulation (correct)

    • What contributes to the cardiac acceleration during exercise?

  • Decrease in venous return
  • Decrease in body temperature
  • Corticohypothalamic discharge and positive chronotropic effect of sympathetic discharge (correct)
  • Decrease in respiration

    • How does muscular exercise affect venous return?

  • The relaxation of skeletal muscles and decreased activity of respiratory muscles
  • Decreased sympathetic activity on the venous system
  • The contraction of skeletal muscles and increased activity of respiratory muscles (correct)
  • Decreased contraction of skeletal muscles

    • What contributes to the increased stroke volume during severe exercise?

    <p>Increased contraction due to a greater end diastolic volume</p> Signup and view all the answers

    What effect does sympathetic activity have on the venous system during exercise?

    <p>Increased sympathetic activity on the venous system</p> Signup and view all the answers

    What contributes to the increased stroke volume during severe exercise?

    <p>Decrease of the end systolic volume due to sympathetic stimulation</p> Signup and view all the answers

    What contributes to the cardiac acceleration during exercise?

    <p>Corticohypothalamic discharge</p> Signup and view all the answers

    What contributes to the increase in venous return during muscular exercise?

    <p>Contraction of the skeletal muscle squeezes the blood towards the heart</p> Signup and view all the answers

    What effect does the increase in body temperature have on cardiac acceleration during exercise?

    <p>It evokes the Bainbridge reflex</p> Signup and view all the answers

    What effect does increased sympathetic activity have on the venous system during exercise?

    <p>It increases venous return</p> Signup and view all the answers

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